chdir uses /sys/kernel/debug/tracing then expects to be in /sys/kernel/debug

[GoogleCodeExporter]

I made the following change in sreadahead.c to make the trace work (near
line 479):
        unmount = chdir("/sys/kernel/debug/tracing");
        if (unmount == 0) {
                chdir("/sys/kernel/debug");
        } else {
Instead of:
        unmount = chdir("/sys/kernel/debug/tracing");
        if (unmount != 0) {
sreadahead was giving the following error messages and failing to create a
pack file before I made this change:
Unable to disable tracing
: No such file or directory
Unable to open readahead file
: No such file or directory

I'd send a patch, but this is a pretty simple change and I actually don't
know of the top of my head how to generate a patch.

Original issue reported on code.google.com by [email protected] on 20 May 2009 at 8:34